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Administration of Thamnidium elegans for effective utilization of agroindustrial materials (wheat bran) creates new perspectives for animal cereal diet enriched with fungal gamma-linolenic acid (GLA). The aim of our study was to evaluate the effect of adding prefermented cereal product containing a high amount of gamma-linolenic acid into the feed on broiler chickens' performance, fatty acids profile and oxidative stability in chilled breast meat. Seventy eight COBB 500 one-day old broiler chicks were randomly divided into 2 treatment groups with three replications and fattened for 42 days. During the first 21 days, all broilers consumed the starter diet. After three weeks, broilers were fed the grower diet; controls were fed without the addition of prefermented cereal product; and the experimental group was supplemented with 3% of prefermented product. Higher final body weight (2 688 vs. 2 604 g) and feed conversion ratio were recorded in the experimental group (P > 0.05). The increased GLA content in the experimental diet (0.095 g.kg(-1)) resulted in a significant increase of GLA, dihomo-GLA and arachidonic acid in the lipids of breast muscle tissue (P < 0.05). Adding prefermented product to the feed also resulted in an increase in total n-3 polyunsaturated fatty acids (PUFA), mainly eicosapentaenoic and docosapentaenoic acid in lipids of breast (P < 0.05). The experimental diet produced a significant decrease in the n-6/n-3 ratio (from 10.00 to 8.14). Storage of breast muscles with a higher PUFA in chilling conditions led to a decrease in oxidative stability when the values of thiobarbituric acid-reactive substances (TBARS) increased (P < 0.05). This is a first study using prefermented cereal product for the fattening of broiler chickens.

acta veterinaria brno

Effect of adding prefermented cereal product containing gamma-linolenic acid to broiler feed on production indicators and fatty acid profile of chicken breast